High pressure lubricator construction



April 27, 1937. J. c. MORROW I HIGH PRESSURE LUBRICATOR CONSTRUCTION Filed March 27, 1956 5' (fa/777 C J/Of/OW Patented Apr. 27, 1937 UNITED STATES HIGH PRESSURE LUBRICATOR CONSTRUCTION John C. Morrow, Chicago, Ill., assignor to Morrow Lubricator Company, Chicago, 111., a corporation of Illinois Application March 27, 1936, Serial No. 71,092

7 Claims.

oil to bearings, or other parts to be lubricated,

which cannot be lubricated by an ordinary oil can.

An object of the present invention is to provide a high pressure oil lubricator which will be convenient to hold and use and which at the.

same time is so constructed that oil may be discharged under a pressure of several hundred pounds.

Another object of the present invention is to provide a high pressure oil lubricator, or oil gun, wherein the oil is ejected by palm pressure applied to an end of the lubricator.

A further object of the present invention is to provide a high pressure lubricator with an elongated tubular body having a spout applied to one end of the body and having a capenclosing the other end of the body, which cap is telescopically mounted and movable on the body for discharging oil through the spout.

A further object of the present invention is to provide a novel system valve construction for high pressure oil lubricators.

Generally speaking, the invention contemplates a lubricator or can body of elongated tubular form, preferably cylindrical, which, at one end, is closed except for an aperture for a plunger rod and which at the other end is adapted to receive a spout. A plunger rod extends axially through the body of the lubricator and projects through the closed end. A cap is telescopically mounted on the closed end of the lubricator and is suitably secured to the plunger for operating it. The other end of the rod carries a novel valve construction of the present invention.

Preferably guide means are provided Within the body for guiding the rod as it is reciprocated in use.

Spring means are interposed within the cap for normally maintaining the cap and its connected rod in retracted position.

The retracted position of the rod and cap is limited by means on the rod engaging the rod guideway.

The above, other, and further objects of the present invention will be apparent from the following description and the accompanying drawmg.

The accompanying drawing illustrates an embodiment of the present invention, and the views thereof are as follows:

Figure l is an elevational view of a high pressure oil lubricator constructed in accordance with the present invention, and showing the relationship of the parts, in full lines, when the cap is in retracted position, and in dotted lines the position to which the cap is moved for discharging oil through the spout.

Figure 2' is an enlarged axial. sectional view through the body of the lubricator of the present invention and showing parts in normal or inoperative position, that is with the rod and cap in retracted position and the piston valve seated on its seat at the opposite end of the rod.

Figure 3 isv an end view of the body looking at the lower end of Figures 1 and 2.

Figure 4 is an enlarged fragmental view, partially in section and partially in elevation, of a portion of the spout, the novel piston valve arrangement of the present invention, and a portion of the plunger rod.

The drawing will now be explained.

The body A is illustrated as an elongated cylindrical tubular structure having one end closed as by a. part I, except for an opening or aperture 2 through which a plunger rod passes. Preferably the exterior of the body A is knurled or roughened as at 3 to afiord means for gripping the body during high pressure lubrication.

The other end of the body is reduced in diameter to provide neck 4 for receiving a spout. The body A and end closure I may be drawn or otherwise formed from flat stock.

In order to reinforce the neck 4, a. flanged ring 5 is spun or otherwise secured to the neck of the body. The interior of this ring is threaded at 6' to receive a threaded male portion 1 of a spout.

Secured within the aperture 2 of the enclosure I is a guide sleeve 8, fastened in position by being pressed in the aperture 2, or otherwise thereto fastened. This sleeve 8 extends. inwardly of the body for a portion of its length, and serves to guide the plunger rod B when reciprocated in use.

The plunger rod B is herein illustrated as consisting of two parts 9 and ill, with the part 9 of greater length.

As herein illustrated, the inner end of the part 9 of the rod. is reduced in diameter and threaded as at H. Between the threaded end I I and the body of the rod a shoulder i2 is fashioned.

The shorter portion Ill of the rod is counterbored and threaded at one end, as at [3, to receive the threaded extension I l of the part 9, and is counterbored and threaded at the other end, as at [4, to receive a screw l5 for securing the cap C to the rod for actuating it.

Applied about the threaded extension ll of the part 9, and resting against the shoulder I2, is a washer l6, prefer-ably in the form of a. truncated cone. When the parts 9 and ID of the rod. are screwed together, the washer is forced against the shoulder l2 and engages the interior of the sleeve 8 to prevent escape of oil from within the body A outwardly through the sleeve 8.

which bears against the extremity of the sleeve 8.

The other end of the part 9 of the rod B, herein for convenience termed the upper end, is formed with a conically tapered portion I 9 which piston valve member 29. .Projecting from the apex of the conical portion I9 is an extension 2! of reduced diameter, and having a threaded extremity 22. In forming the extension ZI, preferably, a collar 23 is formed on it to serve as an abutment, for a purpose to be later explained.

The piston valve member 2%] is fashioned with a head or end portion 24 and a skirt 25. The head or end portion 24 has an opening 26 through it with an upstanding flange 50 on its outer face. The diameter of the opening 26 is greater than the diameter of the extension 2! and less than the diameter of the portion 9 of the rod and seats against the tapered portion I9 of the rod.

I A nut 2'! having a depending skirt portion 28 is threaded to engage the threaded extremity 22 of the extension of the rod.

When the nut is applied to the extension, it is screwed home against the shoulder 23 to thereby limit position of the nut on the extension. The skirt portion 28 of the nut has a slotor slots 29 formed in it, so that oil may pass from the interior of the piston member 2!! into the'spout when the piston member is unseated against the tapered portion I9.

Surrounding the skirt 28 of the nut is a spring 30 which bears against the under side of the head of the nut and against the head 24 of the piston valve member 28 to urge the piston valve against its seat. The interior of the skirt portion 25 of the piston valve 20 is greater than the exterior diameter of the portion 9 of the rod where the skirt surrounds the rod.

Within the cap C and between the end closure member I of the body and the cap, is interposed a spring 3I for maintaining'the rod B and cap C normally in retracted position, that is in the position shown in Figure 2, which retracted position is limited by the engagement of the ring I8 against the extremity of the sleeve 8.

The spout, herein illustrated, has a part, preferably formed as a casting, or a forging, 32 which has a cylindrical chamber 33 extending into the casting. The lower end of the casting is swedged or otherwise secured to the cap 34 of the spout. Theportion 33 has a restricted opening 35 formed in it, and above this restricted opening is a cylindrical opening 35 of greater diameter. The upper end of the part 33 receives the portion 31 of the spout structure, which, at its extremity carries a tip 38. The tip 38 may be the tip of my copending application Serial No. 71,094 filed March 2'7, 1936, or of the construction embodied in Reissue Letters Patent No. 18,526 granted July 12, 1932,130 E. H. Morrow.

The interior diameter of the chamber 33 of the part 32 of the spout and the exterior diameter of the piston valve member 29 is such that light friction occurs between the wall and the piston when the same is reciprocated. The restricted opening in the member 32 is normally closed by a ball valve 39 which is maintained against the aperture by means of a spring 40. The spring 40 is retained in the portion 31 of the spout by means of a flat metal holder 4| of cross shape which is' forced into the adjacent extremity of the portion 31 of the spout structure.

-through the other end of the sleeve 8 exteriorly of the end closure I of the body, and the parts are thereupon fastened together by threading, as ilserves as a seat for a substantially cup shaped lustrated in Figure 4. The body A is then held in upside down position and the spring 3i applied about the plunger rod, the cap 0 applied over the closed end of the body and forced towards the closed end to compress the spring 3i sufiiciently so that the screw I5 may be inserted through the screw receiving aperture Ita in the cap C and threaded into the bore Id of the part I 0. When the screw has been forced home, pressure is released and the plunger rod B and cap C are, by action of the spring 3i, moved to retracted position which is that limited by engagement of the ring l8 with the sleeve 8.

The spout is then applied by screwing cap 34 into the ring 5 at the neck of the body whereupon the structure is ready for use.

After the body A has been filled with oil, the operation thereof is as follows:

In order to discharge oil under pressure, from the lubricator of the present invention, it is necessary to trap a charge of oil within the chamber 33 of the spout. To do this the lubricator is tilted downwardly and pressure applied against the cap to reciprocate the plunger a few times.

With the chamber 33 empty, and the lubricator tilted as described, when the plunger rod is returned to normal or retracted position, the piston rod member 20 will become unseated due to slight frictional engagement with the wall of the chamber 33 and also to vacuum present in this chamber by reason of the fact that the ball 39 closes the chamber to the atmosphere. Such action will compress the spring 28 as the piston member 20 is moved towards the skirt of the nut, thus unseating it on its seat on the tapered portion IQ of the rod. Because of the presence of the slot or slots 29 in the skirt of the nut, oil will then flow into the chamber 33 until the rod is fully retracted. The lubricator is now ready to discharge the trapped oil.

The spout of the lubricator is applied to an oil orifice with the pilot of the tip 38 in the orifice, and palm pressure of the operator applied against cap C moves the plunger upwardly as viewed in Figures 2 and 4, Such movement axially maintains the valve member 20 against its seat and compresses the oil within the chamber 33 until the resistance of the spring 40 is overcome whereupon this oil is discharged through the spout and into the oil orifice of the part to be lubricated. Release of pressure against the cap C will enable the spring 3! to return the parts to normal position, which movement will again fill the chamber 33 with another charge of oil.

By reason of the provisions of the cap C being subject to palm pressure, a greater force may be applied to the plunger rod 9 than can be applied where such rod is normally operated by thumb pressure.

The lubricator has to be tilted downwardly, that is with its spout downwardly, after every discharge operation, to fill the chamber 33 with another charge of oil.

It will be observed that the lubricator of the present invention is one which may be readily manufactured at minimum labor costs, as the parts may be readily formed by drawing, casting, or other machine operations. Furthermore, the provision of the telescoping cap makes it possible to eject oil under higher pressure than otherwise possible with lubricators in use at the present time.

The diameter of the body A is of such a size as to be conveniently held in one hand of an operator to afford a firm grip of the lubricator and enable the use of the other hand of the operator to actuate the cap C.

The invention has been described herein more or less precisely as to details, yet it is to be understood that the invention is not to be limited thereby, as changes may be made in the arrangement and proportion of parts, and equivalents may be substituted without departing from the spirit and scope of the invention.

The invention is claimed as follows:

1. A piston valve construction including a stem having a frusto-conical portion near one end and having an extension beyond said portion, a cup-shaped piston on said stem and having a central aperture in its end for seating on said frusto-conical portion of the stem with the skirt portion of the piston extending along the stem towards its other end, the extremity of said extension being threaded, a nut threaded onto said extensions extremity to retain the piston on the stem, a spring between said nut and piston to urge said piston to seat on said frusto-conical portion of the stem, and said nut having an oil passageway to permit oil to escape from the aperture in the piston and past the nut when the piston is moved against said nut on the return stroke of the piston.

2. In a piston type high pressure oiler, a body and a spout, said spout having a cylindrical portion therein, a plunger rod operable through the body from a point opposite the spout, the end of the rod adjacent the spout being conically tapered and having a threaded extension of reduced diameter projecting from the apex of the taper, a cup-shaped piston valve loosely supported on said rod and having a central aperture in its end to engage an intermediate part of the tapered rod end as a seat, a nut on said threaded extension to retain said valve on the rod, a spring between the nut and valve to urge the latter against its seat and to maintain said piston normally closed to oil passage through it, said valve being reciprocable within the cylindrical portion of the spout, said spout having a restricted passageway at the end of said cylindrical portion, a check valve disposed to normally close said restricted passage, said piston being axially movable on said rod to permit oil from the lubricator body to enter the cylindrical portion of the spout on the return stroke of the rod, manual movement of the rod to discharge oil past the check valve causing seating of the valve on its tapered seat and movement of the rod in opposite direction causing unseating of the piston valve by reason of the friction within the chamber for permitting passage of oil from within the body into the cylindrical portion of the spout, and said nut having an oil passageway in it to allow oil to flow past it when the valve is unseated.

3. A high pressure lubricator including a can body and a spout, said spout having a restricted passage between its ends, a check valve normally closing said passage, a piston movable within said spout inwardly of said passage, a plunger operable through the can body at a point opposite said spout and having an end within said spout, said piston being carried by said plunger end and being movable with respect to the same, said piston having a port through its end portion and said rod having a seat for said port, and means normally retaining said piston against its seat.

4. A high pressure oiler including an elongated tubular body of uniform cross section closed at one end and having a spout receiving neck at the other end, a guide sleeve connected to the end closure and providing a plunger rod guideway through said end closure and projecting towards the other end of the body within the same, a plunger rod reciprocable within the sleeve and having surface engagement with the sleeve throughout the length of said guideway and having one end extending outwardly of said end closure at said body end and its other end provided with outwardly opening valve means adapted to enter an attached spout, a cap telescopically arranged about the closed end of said body to encompass said end and having means for connecting said rod to said cap for moving said rod in a direction to discharge oil by palm pressure applied against said cap, and spring means within said cap effective to move the cap and rod in the opposite direction.

5. A high pressure oiler including an elongated cylindrical body closed at one end except for a plunger rod aperture and at its other end being provided with a neck to receive a spout in connected relation, a plunger rod extending axially of the body and having an end projecting through said aperture outwardly of the end closure and carrying normally closed pressure responsive valve mechanism at its other end, and an end cap being telescopically mounted on said body overlying said closed end and being connected to said rod for reciprocating it.

6. A high pressure oiler including an elongated cylindrical body closed at one end except for a plunger rod aperture and at its other end provided with a neck to receive a spout in connected relation, .a reciprocable plunger rod extending axially of said body and having one end projecting through, said aperture outwardly of the end closure and carrying valve mechanism at its other end which mechanism is normally closed to oil passage, a sleeve secured to said end closure and projecting into the interior of the body for guiding said rod, and an end cap telescopically mounted on said body overlying said closed end and being connected to said rod for reciprocating it.

'7. A high pressure oiler including an elongated 4:

cylindrical body closed at one end except for a plunger rod aperture and at its other end provided with a neck to receive a spout in connected relation, a reciprocable plunger rod extending axially of said body and having one end projecting through said aperture outwardly of the end closure and carrying valve mechanism at its other end which is normally closed to oil passage, a sleeve secured to said end closure and projecting into the interior of the body for guiding said rod, an end cap telescopically mounted on said body overlying said closed end and being connected to said rod for reciprocating it, and spring means within said cap for normally maintaining said cap and connected rod in retracted position.

JOHN C. MORROW. 

